1210000200121 has 16 divisors (see below), whose sum is σ = 1278843496000. Its totient is φ = 1141682024448.

The previous prime is 1210000200109. The next prime is 1210000200131. The reversal of 1210000200121 is 1210020000121.

It is a cyclic number.

It is not a de Polignac number, because 1210000200121 - 2⁹ = 1210000199609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210000200098 and 1210000200107.

It is not an unprimeable number, because it can be changed into a prime (1210000200131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4619530 + ... + 4874428.

It is an arithmetic number, because the mean of its divisors is an integer number (79927718500).

Almost surely, 2^{1210000200121} is an apocalyptic number.

It is an amenable number.

1210000200121 is a deficient number, since it is larger than the sum of its proper divisors (68843295879).

1210000200121 is a wasteful number, since it uses less digits than its factorization.

1210000200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255928.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1210000200121 its reverse (1210020000121), we get a palindrome (2420020200242).

The spelling of 1210000200121 in words is "one trillion, two hundred ten billion, two hundred thousand, one hundred twenty-one".